I was stationed 3 years at Ft. Sill Oklahoma, I know how fast weather can change. One late spring/early summer it was in the high 70's, a supercell built causing a small tornado, which then cooled every thing to the point that it snowed(not hail but snow) a couple of inches in a few hours, the snow was gone the next day. The Oklahomians(Oklahomites???) have a saying: "If you don't like the weather, wait a minute")